Iron Mountain Incorporated
DE ˙ DB ˙ US46284V1017
109,55 € ↓ -0,60 (-0,54%)
2026-06-04
DEL PRIS
SecurityDE:I5M / Iron Mountain Incorporated
InstitutionMutual Advisors, LLC
Latest Disclosed Ownership129,055 shares
Latest Disclosed Value $ 13,181,661
Mutual Advisors, LLC reports 5.07% increase in ownership of I5M / Iron Mountain Incorporated

On May 1, 2026 - Mutual Advisors, LLC filed a 13F-HR form disclosing ownership of 129,055 shares of Iron Mountain Incorporated (DE:I5M) valued at $11,457,503 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 122,833 shares of Iron Mountain Incorporated. This represents a change in shares of 5.07% during the quarter. The current value of the position is $14,137,975 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-01 2026-03-31 13F IRON MTN INC DEL COM 46284V101 129,055 6,222 5.07 13,182 29.38 0.2821
2026-02-02 2025-12-31 13F IRON MTN INC DEL COM 46284V101 122,833 197 0.16 10,189 -20.06 0.2184
2025-11-04 2025-09-30 13F IRON MTN INC DEL COM 46284V101 122,636 -9,820 -7.41 12,746 -3.14 0.2807
2025-07-28 2025-06-30 13F IRON MTN INC DEL COM 46284V101 132,456 2,013 1.54 13,158 15.00 0.3286
2025-04-28 2025-03-31 13F IRON MTN INC DEL COM 46284V101 130,443 9,598 7.94 11,442 -14.12 0.3275
2025-01-17 2024-12-31 13F IRON MTN INC DEL COM 46284V101 120,845 -2,978 -2.41 13,323 -14.59 0.3856
2024-10-25 2024-09-30 13F IRON MTN INC DEL COM 46284V101 123,823 1,829 1.50 15,598 28.54 0.4559
2024-07-30 2024-06-30 13F IRON MTN INC DEL COM 46284V101 121,994 -5,683 -4.45 12,136 18.51 0.3663
2024-05-02 2024-03-31 13F IRON MTN INC DEL COM 46284V101 127,677 -2,220 -1.71 10,241 12.65 0.3284
2024-01-12 2023-12-31 13F IRON MTN INC DEL COM 46284V101 129,897 -8,208 -5.94 9,090 10.72 0.3163
2023-11-13 2023-09-30 13F IRON MTN INC DEL COM 46284V101 138,105 -7,258 -4.99 8,210 -0.59 0.3202
2023-07-31 2023-06-30 13F IRON MTN INC DEL COM 46284V101 145,363 -20,110 -12.15 8,260 -5.67 0.3135
2023-04-11 2023-03-31 13F IRON MTN INC DEL COM 46284V101 165,473 -1,420 -0.85 8,755 5.24 0.3592
2023-01-12 2022-12-31 13F IRON MTN INC DEL COM 46284V101 166,893 -624 -0.37 8,320 12.94 0.3722
2022-11-03 2022-09-30 13F IRON MTN INC DEL COM 46284V101 167,517 -1,991 -1.17 7,366 -10.75 0.3790
2022-08-15 2022-06-30 13F IRON MTN INC COM 46284V101 169,508 1,954 1.17 8,253 -11.11 0.5464
2022-05-09 2022-03-31 13F IRON MTN INC COM 46284V101 167,554 -1,707 -1.01 9,284 4.82 0.5196
2022-02-14 2021-12-31 13F IRON MTN INC COM 46284V101 169,261 5,330 3.25 8,857 24.34 0.4687
2021-11-15 2021-09-30 13F IRON MTN INC COM 46284V101 163,931 1,672 1.03 7,123 3.73 0.4215
2021-08-12 2021-06-30 13F IRON MTN INC COM 46284V101 162,259 10,313 6.79 6,867 22.10 0.4072
2021-05-13 2021-03-31 13F IRON MTN INC COM 46284V101 151,946 34,821 29.73 5,624 62.87 0.3848
2021-02-11 2020-12-31 13F IRON MTN INC COM 46284V101 117,125 33,602 40.23 3,453 54.29 0.2565
2020-11-13 2020-09-30 13F IRON MTN INC COM 46284V101 83,523 23,044 38.10 2,238 41.74 0.1941
2020-08-05 2020-06-30 13F IRON MTN INC COM 46284V101 60,479 21,274 54.26 1,579 69.24 0.1552
2020-05-13 2020-03-31 13F IRON MTN INC COM 46284V101 39,205 -378 -0.95 933 -26.07 0.1266
2020-02-11 2019-12-31 13F IRON MTN INC COM 46284V101 39,583 16,160 68.99 1,262 66.27 0.1342
2019-11-01 2019-09-30 13F IRON MTN INC COM 46284V101 23,423 4,915 26.56 759 31.09 0.1003
2019-08-15 2019-06-30 13F IRON MTN INC COM 46284V101 18,508 5,509 42.38 579 25.60 0.0752
2019-05-15 2019-03-31 13F IRON MTN INC COM 46284V101 12,999 4,216 48.00 461 61.75 0.0683
2019-02-15 2018-12-31 13F IRON MTN INC COM 46284V101 8,783 900 11.42 285 4.78 0.0562
2018-11-15 2018-09-30 13F IRON MTN INC COM 46284V101 7,883 0 0.00 272 -1.45 0.0413
2018-08-15 2018-06-30 13F IRON MTN INC COM 46284V101 7,883 0 0.00 276 6.56 0.0629
2018-05-11 2018-03-31 13F IRON MTN INC COM 46284V101 7,883 330 4.37 259 -9.12 0.0656
2018-02-12 2017-12-31 13F IRON MTN INC COM 46284V101 7,553 7,553 285 0.1076
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.